Table 1.

The evidence board used only one-third of the 36 types in the evidence taxonomy to classify all the 257 non-redundant evidence items. The 12 evidence types are shown in this table along with the number of supporting or refuting evidence items each type was assigned to. Indented evidence types are sub-types of the type in the previous row

Clinical trial types
Evidence type	Evidence for	Evidence against
A pharmacokinetic clinical trial	31	0
A genotyped pharmacokinetic clinical trial	5	1
A randomized DDI clinical trial	49	11
A non-randomized DDI clinical trial	8	0
A parallel groups DDI clinical trial	4	0
Total	97	12
in vitro experiment types
Evidence type	Evidence for	Evidence against
A CYP450, recombinant, metabolic enzyme inhibition experiment	2	0
A CYP450, human microsome, metabolic enzyme inhibition experiment	13	2
A drug metabolism identification experiment	4	0
A CYP450, recombinant, drug metabolism identification experiment with possibly NO probe enzyme inhibitor(s)	31	6
A CYP450, human microsome, drug metabolism identification experiment using chemical inhibitors	8	4
Total	58	12
Non-traceable statement types
Evidence type	Evidence for	Evidence against
A non-traceable, but possibly authoritative, statement	22	0
A non-traceable drug-label statement	52	4
Total	74	4